body {  
    font-size: 20px;
    background-color: tan;
    width: 90%;
    margin: 0 auto;
}
header {
    font-size: 1.5cm;
    text-align: center;
    color: saddlebrown;
    font-family:"微软雅黑";
    font-weight: bold;
    /* border: 1px  sienna solid; */
    height: 100px;
    line-height: 90px;
    background-color: rgb(255, 255, 255);
}

.bg-demo {
    background-color: rgb(255, 255, 255);
}


h1 {
    line-height: 50px;
    text-align: center;
    font-size: 35px;
    font-family: "微软雅黑";
    /* font-weight: normal; */

}

section div {
    width: 100px;
    height: 100px;
    border: 2px white dashed;
    text-align: center;
    line-height: 40px;
    border-radius: 50px;

}

h2 {
    font-family: "微软雅黑";
     font-weight: normal; 
     color: rgb(255, 255, 255);
     width:400px ;
     border-bottom: 1px rgb(212, 212, 212) solid;
   
}
h3 {
    font-family: "微软雅黑";
     font-weight: normal; 
     color: rgb(255, 255, 255); 
}

section p {
    font-size: 18px;
    font-weight: normal;
    color: dimgrey;
    text-align: center;
}


/* font-family: Edwardian Script ITC */
 p {
    text-align: center;
    color: rgb(255, 255, 255);
    font-size: 20px;
    font-weight: bold;

    /* line-height: 1.5px; */
    
}

footer {
    text-align: center;
    color: bisque;
    font-size: 10px;
    font-family: Broadway;
   letter-spacing: 2px;
}
span {
    margin-left: 2em;
}